Improvement in loom



naar smet @anni mijn.

CHARLES W.GILBERT, 0F WORCESTER, MASSACHUSETTS.

Letters Patent No. 103,600, dated May 31, 1870.

IMPROVEMENT IN LOOM.

The Schedule referred to in these Letters Patent and making part of thesame.

scription thereof, reference being 'had to the accompanying drawingforming par't of this specication, and in which- Figure 1 represents .afront viewof so much o f. a loom as is necessary to illustrate mypresent improvements;

Figure 2 represents a top or plan view of the same.

Figure 3 represents a section on line AIB, lig. 2;

Figure 4 represents a rear view; and s Figure 5 represents a view of theright-hand side of the loom, shown in fig. 1. Y f

To enable those skilled in the art to which my invention belongs to makeand use the same, I will describe it more in detail.

My invention or improvement relates to the combination with the bottomcross-girts of central sup-l ports, as hereafter explained.

A A are the side pieces of the loom-frame, which are secured together hymeansof the cross-girts B B.

To the top of the side pieces A A are secured the cross-pieces C C.

-The slides or travelers D work upon supporting bars a connected withIthe top'pieces C G, and have the double hooks E pivoted or hinged tothem, in the'same" manner as the corresponding parts in Bleakies loom,for which he is about to apply for Letters Patent.

The harness-barslor knives F rest upon projections b upon the tops ofthe cross-pieces C', and are heldin place by removable guide-pieces ec'.

From the piece c an arm, d, projects forward and upward, and terminatesinT-shape, as shown in fig. 2.

To the ends e e of arm d are hinged the front. upwardly-curved ends ofthe harness-bars or knives F, as shown in gs. 2 and 5. f

The opposite ends of the harness-knives or bars project back of the topcross-piece C, and are provided with slot f through which pins projectfrom the three-armed lever G, which is pivoted at 1 to a stand, 2,secured to the back cross-piece G. v

The central arm of lever G is connected to the bellcrank or lever Hbythe hinged connection I.

The bell-crank lever H is connected to crank J on I the end ot shaft Kby means of a hinged wrist-piece, lt, and two pieces L L', the latterbeingprovided with aseries of holes, 3, as indicated in fig. 4, (or athat may be used for that purpose,) whereby the conne@ tion can belengthened or shortened at pleasure'.

The crank J should be provided with a slot, so that wrist-pin 4 can bemoved in and ont as the connection L L is lengthened or shortened.

The joined ends of the parts L L being enlarged and flattened, as shownin the drawing, a very strong and still` connection is formed.

In wide looms, complaints have been made that thel frames are liable tosag or spring down, thus impairing and seriously a'ecting the properaction of the looms;

To remedy such diculties', I have introduced auxiliary supporting stepsM, which, in this instance, are fitted to slide upon the lower girts B,the ends of the cross-piece N b'eing fastened to the tops of such steps.

By this arrangement, it will be seen that the ends of the cross-piece Nare supported directly from the steps M, which in turn are so arrangedthat they rest upon the door underneath the front and back girts-B.

While, therefore, the Vsteps are brought directly,for nearly so, underthe frontand back cross-girts, thereby economizing room, they, at thesame time,` are so combined with the ends of the cross-girt as to givedirect support to that, and near each end thereof.

The upper parts of the harness-frames Q are con-v nected to the innerends of the slides or travelers D by means of flattened Wires m, whichpass over rolls or sheaves n,while the lower parts ofthe harness-Yframes are in like manner connected to the outerends of the slides ortravelers D by means of flattened wires' '0, whichpass down under rollsor sheaves p supported' andvturniug on journals in the arm-piecesP,fastened tothe cross-beam or piece N, thence under rolls or sheaves t,supported in arms fastened to the side of the loom-frame; thence up andover sheaves or rolls s to the outer ends of-the slides or travelers I),to which they are properly secured.

Flattcned wire for connecting the harness-frames with the slides ortravelers, is an improvement over cords and straps. It' is strong,light, runs easily, and retains a uniformity of tension, which is agreat desideratum. v

lI prefer to use tempered wire, the ends of such wire having the temperdrawn, to facilitate the attach-- lies on the convex side must beexpanded, while the successive parts of the cylindrical wire are bentover the pulley, and-when many wires'are used, the aggregate strain thusproduced becomes very considerable.

Another defect is that this expanding and compressing action causes thecrystallizing of the ,'metal sooner orlater, and thus units it for use.

With the attened wire no ne of these, defects are noticed. It bends muchmore easily than the other, and thus produces less strain, while, owingto its ilat, thin form, there is no compressive action, and the qualityof the metal is not impaired.

Byarranging theharness-bars or knives across the top -of the loom, andturning or curving up their front projecting ends over the breast-beamS, as shown in the drawingLI ain able to obtain the desired motion tosaidbars to give the necessary elevation and depression to each harness,whereby all of the threads ibi-ming a single shed, will stand upon thesame angle irrespective of the number of harnesses which may bedepressed or raised to form such shed, and that, too, without theintelposition of levers or connections bctween the slides or travelers Dand the wires which connect the same to their respective harness-frames;

By the elevation of the front projecting ends of the harness-bars orknives, they do not incomrnode the operator, while at the same time theyand the arm d -atford very convenient supports for the suspension ofmending or piecing threads.

' When the crank-shaft K is put in motion, "the three-armed lever Gwillbe rocked `back and forth, thereby alternately spreading and closing therear ends of the harness-knives F for opening and closing the harnesses,the double hooks E being operated upon by. means of indicator-levers.

Having thus described my improvements in looms,

lVhat I claim therein as new and of my invention, and desire to secureby Letters Patent, is

1.'The arrangement of central steps under the front and back-girts ofthe loom-frame, and in combination with and supporting the cross-giri;near its ends.

2. v'lhe combination with the front and back girts B of the steps M,substantially as shown and described.

- CHAS. NV. GILBERT;

Witnesses THos. H. DODGE, ALBERT E. IEIRCE.

